Retigabine 2-fluoro impurity Category : ImpurityCAS No. :1476737-81-1Molecular Formula: C16H18FN3O2Molecular Weight : 303.33Chemical Name : Ethyl(2-amino-4-((2-fluorobenzyl)amino)phenyl) carbamate Dimer impurity Category : ImpurityCAS No. : NAMolecular Formula: C23H23F2N3O2Molecular Weight : 411.44Chemical Name : [2,4-Bis-(2-fluoro-benzylamino)-phenyl]-carbamic acid ethyl ester